Title :
Design of user codes in QS-CDMA systems for MUI elimination in unknown multipath
Author :
Scaglione, Anna ; Giannakis, Georgios B.
Author_Institution :
infocom Dept., Rome Univ., Italy
fDate :
2/1/1999 12:00:00 AM
Abstract :
Low-complexity quasi synchronous CDMA systems are derived for eliminating multi-user interference (MUI) completely in the presence of unknown and even rapidly varying multipath. They rely on judiciously designed precomputable user codes and offer a generalization of orthogonal frequency division multiplexing, especially valuable when carrier frequency errors and Doppler effects are present.
Keywords :
Doppler effect; OFDM modulation; code division multiple access; codes; computational complexity; interference suppression; multipath channels; synchronisation; transceivers; Doppler effect; MUI elimination; QS-CDMA systems; carrier frequency errors; low-complexity quasi synchronous CDMA systems; multi-user interference; orthogonal frequency division multiplexing; unknown multipath; user codes; Adaptive filters; Delay; Doppler effect; Filtering; Modeling; Multiaccess communication; Multipath channels; OFDM; Wireless communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.749351
